Power transmission means



241. SOLID MATERIAL COMMINUTION July 13, 1937. w. J. ARMSTRONG 2,086,659

POWER TRANSMISSION MEANS Filed Jan 9' 1932 2 Shees-Sheel Q 5G Ely l Eig.g 4 42 34, 40 sz ATT'YS [O h TI? I OR DISINTEGRATION @@mg ffm-@m 241.SOLID MATERIAL COMMINUTION Slgh @www UO OR DIS INTEGRATION Juy 13, 1937.w. J. ARMSTRONG 2,085,659

POWER TRANSMIS S ION MEANS Filed Jam 9 1952 2 sheets-sheet 2 NVENTOR onDisiNrEcRArioN Patented July 13, 1937 sin 086,659 Power. 'raANsiuissroNManns Walter J. Armstrong, Columbus, Ohio, assigner to The JeffreyManufacturing Company, a corporation of Ohio Application January 9,1932, Serial No. 585,788

lil Claims.

The present invention relates to power transmission means andparticularly to such means designed for the drive of a plurality ofshafts eX- tending side by side and relatively movable to vary thedistance between them. Such a drive finds particular application inCrushers of the plural roll type, wherein one of the rolls is mov-V abletoward and away from the other, and accordingly the invention will bedescribed in connection with such a machine.

Heretofore, in effecting the roll drive of plural roll crushers by meansof a single motor, the two rolls have been customarily interconnected bymeans of spur gears. Under these circumstances only a small relativemovement of the rolls is permissible, since the meshing of the gearsmust be maintained. Relatively long toothed gears of special design havebeen utilized in order to secure the greatest possible range ofmovement, but these gears have been inefficient in operation and evenwith them the range of the machine has been inconveniently restricted.

According to the present invention the rolls are provided with pulleysengaged by an endless strand in such a manner as to secure the properdirection of roll rotation and to permit a wide range of relativedisplaceability. The new arrangement carries with it a considerablenumber of advantages which will be referred to hereinafter in describingone embodiment of the invention as shown in the accompanying drawings.In the drawings:

Figure l is a plan view of a double roll crusher to which my improveddrive has been applied.

Figure 2 is an elevation of the machine of Figure l.

Figure 3 is an enlarged elevation of a portion of the machine, as inFigure 2, but with parts in section and others removed to show detailsof construction, and

Figure l is a section substantially on the line ll--l of Figure 2.

Referring to the drawings, reference numeral Ill designates generally aframe in which are journaled a pair of rolls l! and I2 on shafts I3 andI4. While the elements I3 and I4 may be through shafts, they may, ofcourse, be constituted by studs integral with the rolls. The rolls IIand i2, which constitute abutment and pressure rolls respectively, areshown as being smooth, but if desired, they may be provided with teethin the well known manner.

Shaft i3 is journaled in Xed bearings I5 and I6, while shaft Ill isjournaled in bearings or blocks il and I8 which are slidable onhorizontal tracks I9 and 20 presented by the machine frame. Whilebearings I5 and I 6 are stated as being fixed, this does not, of course,preclude the provision of means for effecting necessary adjustmentthereof. The blocks Il and I8 have secured thereto rods 2l and 22, whichextend through openings formed in frame uprights 23 and 24, the rodsbeing provided inwardly of the uprights with fixed abutment collars asat 25, Figures 2 and 3, between which and the uprights are engagedpowerful compression springs as at 26, the free ends of the rods beingthreaded and engaged by nuts, as at 2l, outwardly of the uprights. Byadjusting the nuts, it will be obvious that the journal blocks Il and I8can be moved along their tracks to vary the distance between rolls I Iand I2. By tightening the nuts, roll I2 is moved away from roll IIagainst the force of the springs, while upon loosening the nuts, thesprings move roll I2 toward roll I I. In any adjusted position thesprings permit movement of roll I2 away from roll II so as to pass largeunpulverable fragments and thus save the machine from shock.

Tie bars or rods 28 and 29 extend from end to end of the machine invertically spaced parallel relation to tracks I9 and 20, the bars beingsupported at one end in bores in the upper ends of uprights 23 and 24,at the other ends in similar uprights Si! and 3l, and at intermediateportions in bores of frame members 32 and 33. Blocks Il and I8 haveupwardly extending portions or arms 34 and 35 provided with bores whichslidably engage bars 28 and 29 to assist in guiding the journal blocks.The tracks and rods constitute vertically spaced slide bearings. Portion34 differs from portion 35 in projecting a greater distance above itsassociated bar 28.

Supported on frame members 23 and 32 are a pair of angle bars 36 and 3l,the bars being arranged with web portions in the same horizontal planeparallel to the track I9 and spaced somewhat from each other. The upperend of arm 34 projects between the angle bars for sliding movementrelative thereto. The vertical Webs of the angle bars are bolted rigidlyto the frame members 23 and 32.

A support or carriage 38 (Fig. 4) in the nature of a block is groovedfor engagement with bars 36 and 3l, and is secured against disengagementwith the bars by means of a cleat 39 secured thereto and underlying theadjacent lower margins of the horizontal webs of the bars, theproportion of parts being such that the support 33 has a free slidingengagement with the bars.

The end of support 38 adjacent arm 34 is in the nature of an open-sidedframe in a threaded bore in the end wall of which is engaged one end ofa threaded rod 40, the other end of the rod being oppositely threadedand engaged in a threaded bore in the upper end of arm 34. Rod 4D isprovided with a central squared portion All which may be engaged by awrench to rotate the rod and thereby adjust support 58 toward or awayfrom arm Sii. A lock nut l2 holds the rod in adjusted position.

Shafts i3 and i4 have secured thereto pulleys 43 and 44 on the same sideof the machine as support 38. The latter is provided with a boreparallel to shafts i3 and lli, in which is engaged a stud shaft 5 andsecured by means of a cap screw 6. A take-up and direction pulley il isrotatably supported on the stud shaft through the intermediary of abushing 48 and held against movement off the free end of the shaft bymeans of an abutment collar 49. On a stud shaft 5B parallel to shaft i5and supported in a bore of the frame below upright 23 is rotatablymounted a direction pulley 5l.

As here shown, all of the pulleys are provided with a plurality ofgrooves for the reception of reversible endless V-belts 52, these beltsengaging the side of pulley 43 remote from the pair oi pulleys i7 and5l, the other end of the belt engaging the last-named pulleys and beinglooped back between them to engage the remote side of pulley fifi.Suitable tension is obtained by properly adjusting the connecting roddt.

With the described arrangement, it will be evident that rotation orshaft I3 in the direction of the right hand arrow, Figure 2, will causeshaft lli to rotate in the direction of the left hand arrow, it beingnecessary in the operation of the machine that the top` portions of therolls move toward each other. It will be evident that due to theconnection between journal block il and support 38, the latter willparticipate in parallel relation in all sliding movements of the formerso that the original tension of the belts will be retained no matterwhat the spacing of roll l2 from roll l l.

The endless belts 52 may be conceived of as each comprising a tripleloop formation of which an inner loop portion, engaging pulley 4, liesbetween outer loop portions, engaging pulleys lll and 5|, in reverserelation thereto. The pulley engaged in the inner loop portion and oneof the other pulleys have rectilinear lines of movement extendingsubstantially centrally of their associated loops with the sections ofeach loop relatively close together and preferably spaced apart nofurther than the diameter of the associated pulley.

The adjustment range of blocks l1 and lt' may be as great as desired,and it will be evident that the frame lll is not conned to use withrolls of any particular size. Consequently, frame l may be made in asingle size and rolls of various sizes associated therewith as required,a uniform belt length suflicing, since varying spacings of roll centersare automatically accommodated. While I have shown a V-belt drive, theinvention is not restricted in this respect as a iiat belt could be usedand for that matter a chain and sprockets might be substituted withoutdeparture from the invention. Also, pulleys of various diameters may beused so that differential roll speeds may be obtained. An endless stranddrive, as disclosed, can be operated at a speed much greater than theconventional gear drive, so that the capacity of the machine isconsiderably increased.

It will be noted that the direction pulleys 41 and 5l are relativelyclose together and they may be as close as possible while maintainingclearance between the outer runs of the belts and pulley 44. Thesections of the loops which engage pulleys 44 and 41 are relativelyclose together, the sections of each loop, as here shown, beingconvergent. Preferably the sections of each loop are spaced apart adistance not greater than the diameter of the associated pulley.Furthermore, these loops are similar in form and are substantiallysymmetrical with respect to horizontal planes passed through therespective pulley axes, the pulleys being movable in these planes. Thisarrangement is very elective in securing proper compensatory adjustmentsof the belt.

Since the direction pulleys are spaced away from the crushing zone inthe longitudinal direction of the apparatus they offer no obstruction tofeed from either side of the machine.

An important advantage of the invention is that the belts have extendedengagement with the roll pulleys. The belts engage pulley 43 throughoutan arc of substantially 180 and pulley lili is engaged throughout an arcin excess of.240". Positive drive is thus assured.

I have shown an upper casing element 53 dening a feed opening and heldin position through brackets 54 and 55, this being, of course, a detailof construction immaterial as regards the invention, and while it ismore or less immaterial where the power input is made, I have shown inFigure l a belt pulley 55 xed on shaft I3 for drive from any suitableprime mover.

It will be understood that while I have described a practical embodimentof the invention in detail, the invention is not limited to the precisestructure disclosed. Various changes may be made without departure fromthe invention as dened in the following claims.

I claim:

1. Apparatus comprising a supporting frame, a pair of rotatable Crusheror like rolls journaled on said frame, one of said rolls being rotatableon an axis fixed relative to the frame and the other being bodilymovable toward and away from the first, pulleys xed to said rollsrespectively, a pair of vertically spaced direction pulleys on that sideof the movable roll remote from the rst roll, one of said directionpulleys being rotatable on an axis xed relative to said frame and theother being mounted for bodily movement in a direction parallel to thedirection of movement of said movable roll, means for transmitting themovement of said movable roll to said movable direction pulley, anendless belt associated with all of said pulleys to drive the rolls inopposite directions, said direction pulleys engaging loops of said beltextending from a loop in which the pulley associated with said movableroll is engaged, and means urging the movable roll toward the other, theloops in which the movable direction pulley and the pulley associatedwith the movable roll are engaged each having its sections relativelyclose together and directed generally in the direction of movement ofthe engaged pulleys.

2. Apparatus comprising a supporting frame, a pair of rotatable Crusheror like rolls journalled on said frame, one of said rolls beingjournalled for bodily movement relative to the other, an endless beltfor driving said rolls in opposite direction, a portion of said belthaving a triple loop t Q oa Drs INTEGRATION 21. SULIlD' lVlA'llnirilAhU'Ulvllvlllwriuri dearth lloc formation in which an inner loop portionlies between outer loop portions in reverse relation to the latter,direction pulleys engaged in the outer loop portions and a pulleyengaged in the inner loop portion, means for bodily moving thelast-named pulley in accordance with bodily movements of the movableroll, one of said direction pulleys having a positionally fixed axis ofrotation and the other being movable-in a pulleys on said shafts, a pairof direction pulleys disposed at that side of the movable journal meansremote from the lixed journal means, an endless drive belt engaged withsaid pulleys, said belt having a triple loop formation of which an innerloop portion lies between outer loop portions in reverse relation to thelatter, said direction pulleys being engaged in said outer loop portionsand the movable shaft pulley being engaged parallel to said xed axis, anadditional pulley direction parallel to the direction of movement insaid inner loop portion, supporting means for l of and in dependenceupon the movement of the one of said pair of pulleys movable in the samepulley engaged in said inner loop portion whereby direction as saidmovable journal IneanS, the to maintain an existing belt tension, saidmovable other of said pair of pulleys being rotatable on a pulleyshaving rectilinear lines of movement exfixed axis, and means forimparting the movetending substantially centrally of their associatedments of Said movable journal rneans to Said sllpl5 loops porting means,the loops engaging the movable 3. Apparatus comprising a supportingframe, a Y pulleys being of similar form and the movable pair ofrotatable Crusher or like rolls journalled pulleys having rectilinearlines of movement exon Said frame7 one of Said rolls being journalledtending substantially centrally of their associated for bodily movementrelative to the other, an endloops 30 less belt for driving said roll-sin opposite direc- 6. Apparatus Comprisingr a pair of parallel tion, aportion of said belt having a triple loop shafts, crusher or like rollsmounted on said formation in which an inner loop portion lies shaftsrespectively and between which material between outer loop portions inreverse relation to is adapted t0 he passed for treatment, journal thelatter, direction pulleys engaged in the outer means for said shaftspermitting their limited loop portions and a pu1ley engaged in Jne innerrelative movement substantially directly toward loop portion, means forbodily moving the lastand aWay from each other Wherehy the throat namedpulley in aoooroianoe with bodily movebetween the rolls is variable insize, pulleys on said ments of the movable roll, one of said directionShafts, a pair of direction pulleys disposed at that puiieys having apositionaliy fixed axis of rota, side of one of the shaft pulleys remotefrom the tion and the other being movable in a direction other shaftpulleyy and an endless drive belt enparallel to the direction ofmovement of and in eased With the Shaft pulley remote from Said pairdependence upon the movement of the pulley of pulleys and looped baokbetween the latter engaged in said inner loop portion whereby to andengaged Witll the adjacent shaft pulley, one maintain an existing belttension, said movable 0f Said pair of pulleys being rotatable on an axis35 pulleys having rectilinear lines of movement exin fixed positionalrelation to the axis of one of tending substantially centrally of theirassociated Said Shafts and the other of Said pair of pulleys loops, andthe respective sections of all the loops boing rotatable on an aXis in'lXed positional relabeing spaced apart a diei-,ance noi; greater thantion to the axis of the other of said shafts, the the diameter of theirrespective associated pulleys. arrangement being Such that upon movementof 40 4 Apparatus Comprising a pair of parallel one of said shaftsrelative to the other its assoenafts, pressure or like rolls mounted onSaid ciated direction pulley is similarly displaced to shaftsrespectively and between which material maintain the eXistine tension ofthe belt, paralis adapted to be passed for treatment, xed j0ur lelplanes tangential to the shaft pulley adjacent nal means for one of saidshafts, journal means Sad direction pulleys intersecting the latter. forthe other of said shafts movable substantially 7 Apparatus Comprising asupporting frame, directly toward and away from the i'lrst whereby apair of rotatable crusher or like rolls journaled the throat between therolls is variable in size, on Sad frame, one 0f said rolls beingjournaled pulleys on Said Shafts, a pair of pulleys disposed for bodilymovement relative to the other, an at that side of one of the shaftpulleys remote endless bolt fol driVng Said rolls in opposite from theother shaft pulley, an endless drive belt direction, a portion of Saidbelt having a triple engaged with Said pulleys, Said beit having a loopformation in which an inner loop portion triple loop formation of whichan inner loop porlies between outer loop portions in reverse relationlies between outer loop portions in reverse tion to the latter,direction pulleys engaged in relation to the latter, said directionpulleys being the outcl loop portions and a pulley engaged engaged insaid outer loop portions and the movin the inner loop portion, means forbodily able shaft pulley being engaged in said inner loop InoVine thelast-named pulley in accordance portion, supporting means for one ofsaid pair of With bodily movements of the movable roll, one pulleysmovable in the same direction as said of Said direction pulleys having apositionally movable jonrnai means, the other of Said pail of fixed axisof rotation and the other being mov- 60 pulleys being rotatable on afixed axis, and means able ln dependence upon the movement of the forimparting the movements of said movable pulley engaged in Said innerloop portion Wherejournal means to Said Supporting means, the by tomaintain an existing belt tension, the loops loops engaging the movablepulleys being of simiengaging the movable pulleys being of similar larform and the movable pulieys having reci-,1 form and the movable pulleyshaving rectilinear G5 linear lines of movement extending substantiallylines of movement eXtendng substantially Cencentrally of theirassociated loops. tr ally of their associated loops.

5. Apparatus comprising a pair of parallel 8- Apparatus Comprising aSupporting frame, shafts, pressure or like rolls mounted on said acarriage mounted on Said frame for reciprocashafts respectively andbetween which material is tory movements relatively thereto, a rollmountadapted to be passed for treatment, fixed journal ed on said frameto rotate on a fixed axis, a means for one of said shafts, journal meansfor pulley connected to said roll to rotate therewith, the other of saidshafts movable substantially an additional roll mounted on said carriageto directly toward and away from the rst whereby move bodily therewithand to rotate on an axis 7 the throat between the rolls is variable insize, 75

connected to said additional roll to rotate therewith, a direction andtake-up pulley mounted to rotate on an axis parallel to the axes of Saidrolls, an additional direction pulley mounted to rotate on a xed axisparallel to said first-named fixed axis and at a fixed distancetherefrom, an endless belt associated with said pulleys to cause saidrolls to rotate on their axes in opposite directions, said pulleys beingdisposed in such inter-relation as to secure at least two hundred andforty degrees of angular driving contact between the belt and the pulleyconnected to the roll mounted on said carriage while rotating said rollson their axes in opposite directions, means for driving said pulleys andsaid belt to secure such opposite rotation of said rolls, andcompression springs acting on opposite ends of said carriage to urge thesaid additional roll toward said first-named roll to exert pressure onmaterial passing between said rolls and permit spreading of said rollsin accordance with the nature of such material.

9. In a double roll Crusher, the combination with a supporting frame, ofan abutment roll, a pressure roll, journal bearings for the oppositeends of said pressure roll, a pair of vertically spaced slide bearingsfor each of said journal bearings, pulleys connected to said rolls, adirection pulley mounted on said frame, a take-up pulley, a carriage forsaid take-up pulley and connected to one of said journal bearings tomove bodily therewith, a slide bearing for said carriage and locatedabove one of said vertically spaced slide bearings, an endless beltconnected to said pulleys to drive the rolls in opposite directions,rods extending from said journal bearings through the rear portion ofsaid frame, and compression springs between the frame and intermediateportions of said rods in position to yieldingly urge the pressure rollagainst the abutment roll.

10. In a double roll crusher, the combination with a supporting frame,of an abutment roll, a pressure roll, journal bearings for the ends ofthe shaft of the pressure roll, tie rods secured at their ends to theends of said frame and extending through said journal bearings, slidebearings for the lower sides of said journal bearings, pulleys connectedto said rolls, a direction pulley mounted on said frame, a take-uppulley, a carriage for said take-up pulley and connected to one of saidjournal bearings to move bodily therewith, a slide bearing for saidcarriage and mounted on said frame immediately above one of said tierods, mechanism comprising springs acting on said journal bearings toyieldingly urge said pressure roll against said abutment roll, and meanscomprising an endless belt associated with said pulleys for rotatingsaid rolls in opposite directions irrespective of the spacing betweenthe axes thereof.

WALTER J. ARMSTRONG.

